High Quality Industrial Factory D2 Tool Steel | 1.2379 | X153CrMo12 | SKD11 Wholesale to Doha
1. Relevant D2 Steel Specifications Country USA German Japan Standard ASTM A681 DIN EN ISO 4957 JIS G4404 Grades D2 1.2379/X153CrMo12 SKD11 2. D2 Tool Steel Chemical Composition ASTM A681 C Mn P S Si Cr V Mo D2 1.4 1.6 0.1 0.6 0.03 0.03 0.1 0.6 11 13 0.5 1.1 0.7 1.2 DIN ISO 4957 C Mn P S Si Cr V Mo 1.2379/X153CrMo12 1.45 1.6 0.2 0.6 0.03 0.03 0.15 1.6 11 13 0.7 1 0.7 1 JIS G4404 C Mn P S Si Cr V Mo SKD11 1.4 1.6 0.6 0.03 0.03 0.4 11 13 0.2 0.5 0.8 1.2 3. AISI Grade...
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1. Relevant D2 Steel Specifications
|Standard||ASTM A681||DIN EN ISO 4957||JIS G4404|
2. D2 Tool Steel Chemical Composition
|DIN ISO 4957||C||Mn||P||S||Si||Cr||V||Mo|
3. AISI Grade D2 Steel Mechanical Properties
|Hardness, Knoop (converted from Rockwell C hardness)||769||769|
|Hardness, Rockwell C||62||62|
|Izod impact unnotched||77.0 J||56.8 ft-lb|
|Elastic modulus||190-210 GPa||27557-30457 ksi|
|Thermal expansion||10.4 x 10-6/ºC||20-100||
4. AISI/ASTM A681 D2 Grade Steel Forging
Heating for forging of AISI D2 tool steel should
be done slowly and uniformly. Soak through at 1850°-1950°F and reheat as often
as necessary, stopping work when the temperature drops below 1700°F(926℃). After D2
die steel forging, cool slowly in lime, mica, dry ashes or furnace. AISI D2 steel
should always be annealed after forging.
5. D2 Tool Steel Heat Treatment
ASTM D2 steels alloy should be preheated very slowly to 815oC (1500oF) and then temperature can be increased to 1010oC (1850oF). They are then held at 1010oC (1850oF) for 20 to 45 minutes and air cooled (air quenched).
Annealing of D2 tool steels material should be done at 871 to 898oC (1600 to 1650oF) followed by slow furnace cooling at 4.4oC (40oF) per hour or less.after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.
When desirable to relieve the strains of machining, heat D2 grade steel slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).
Preheat Prior To Hardening
Preheat slowly to 1350°-1450°F and hold at this temperature until grade steel D2 material is uniformly heated.
After thorough preheating, heat to 1800°-1850°F. Hold the work piece at the hardening temperature until it is completely and uniformly heated.
AISI D2 steel tool material is an air hardening steel and will develop hardness on cooling in still air. To avoid scaling and prevent decarburization of the work piece surface, controlled atmosphere or vacuum furnaces are recommended. If these furnaces are not available, pack hardening, salt baths or wrapping the piece in stainless steel foil will provide some degree of surface protection in the hardening process. Parts should be allowed to cool to 150F, or to where they can be held in the bare hand, and then temper immediately.
The tempering temperature on material D2 steel may be varied according to the desired hardness. D2 steels can be tempered at 204oC (400oF) for achieving Rockwell C hardness of 61 and at 537oC (1000oF) for a Rockwell C hardness of 54.
6. D2 Tool Steel Material Application
AISI grade D2 tool steels are used for long run tooling applications, where wear resistance is important, such as blanking or forming dies and thread rolling dies.
Some main applications for D2 tool steel are as below:
Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts.
We usually hold D2 tool steel on sale activities, and you would have our price on regular schedule. Contact us and sign in our newsletter to have D2 tool steel materials price list and commercial quote today.
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UNESCO: Representative List of the Intangible Cultural Heritage of Humanity – 2008
Description: The kris or keris is a distinctive, asymmetrical dagger from Indonesia. Both weapon and spiritual object, the kris is considered to possess magical powers. The earliest known kris go back to the tenth century and most probably spread from the island of Java throughout South-East Asia.
Kris blades are usually narrow with a wide, asymmetrical base. The sheath is often made from wood, though examples from ivory, even gold, abound. A kris aesthetic value covers the dhapur (the form and design of the blade, with some 40 variants), the pamor (the pattern of metal alloy decoration on the blade, with approximately 120 variants), and tangguh referring to the age and origin of a kris. A bladesmith, or empu, makes the blade in layers of different iron ores and meteorite nickel. In high quality kris blades, the metal is folded dozens or hundreds of times and handled with the utmost precision. Empus are highly respected craftsmen with additional knowledge in literature, history and occult sciences.
Kris were worn everyday and at special ceremonies, and heirloom blades are handed down through successive generations. Both men and women wear them. A rich spirituality and mythology developed around this dagger. Kris are used for display, as talismans with magical powers, weapons, sanctified heirlooms, auxiliary equipment for court soldiers, accessories for ceremonial dress, an indicator of social status, a symbol of heroism, etc.
Over the past three decades, kris have lost some of their prominent social and spiritual meaning in society. Although active and honoured empus who produce high-quality kris in the traditional way can still be found on many islands, their number is dramatically decreasing, and it is more difficult for them to find people to whom they can transmit their skills.